An automatic fire alarm and extinguishing system and method for use in a box transformer

Abstract

The application belongs to the technical field of transformers, and provides an automatic fire-fighting alarm and extinguishing system and method in a box transformer, wherein the automatic fire-fighting alarm and extinguishing system in the box transformer comprises a control system, a temperature sensor, a smoke sensor, a camera, an image processing device, a cooling fan, a heat exchanger, an air conditioner and an extinguishing device; the control system divides the state in the box transformer into a first fire warning event, a second fire warning event and a third fire warning event according to different states of signals of the temperature sensor, the smoke sensor and the image signal processed by the image processing device; and the control system controls different components to act according to different levels of warning events. Different signals from the three detection devices are used to identify different conditions in the transformer room, and fire hazards are found in time. The comprehensive judgment of the three detection signals can improve the judgment of the environment in the box more accurately, and fire warning can be accurately performed.

Description

Technical Field

[0001] The present application relates to the field of transformers, and in particular to an automatic fire alarm and fire extinguishing system and method for use in a box-type transformer. Background Art

[0002] Box transformers are widely used in new energy industries such as wind, solar and energy storage. Box transformers in large power stations are prone to overheating and burning when they are subjected to current loads exceeding their rated capacity for a long time. Short circuit faults sometimes occur inside some box transformers, which can also cause equipment to burn. At present, some new energy box transformers are equipped with fire alarm systems, which can promptly alarm when a fire occurs inside the box transformer, and remind operation and maintenance personnel to cut off the fault point in time to prevent the disaster from expanding. The commonly used fire alarm systems in box transformers now include smoke detectors, temperature detectors, and alarm hosts. When a fire disaster occurs, the smoke detector can transmit a signal to the alarm host. After receiving the signal from the detector, it will determine whether it is a fire alarm and process it according to the preset logical rules. If it is an alarm signal, it will sound an audible and visual alarm to alert relevant personnel or the fire department.

[0003] The current technology has the following problems:

[0004] 1. Emergency response can only be carried out when fire disasters occur in box-type transformers, and fire hazards cannot be discovered in time, nor can fire prediction and early warning be carried out;

[0005] 2. The functions are limited and cannot be linked with other protection systems in the box-type transformer;

[0006] 3. Judging whether a fire has occurred solely through the detection results of smoke detectors or temperature detectors may result in misjudgment and fail to provide accurate and timely fire warnings.

[0007] 4. After a fire is detected, only an alarm is issued to alert relevant personnel or the fire department, but the fire point cannot be dealt with in a timely and targeted manner. Summary of the Invention

[0008] The purpose of this application is to provide an automatic fire alarm and fire extinguishing system and method for a box-type transformer to solve the above-mentioned technical problems existing in the prior art, mainly including the following aspects:

[0009] In a first aspect, the present application provides an automatic fire alarm and fire extinguishing system for a box-type transformer, comprising a control system, a temperature sensor, a smoke sensor, a camera, an image processing device, a cooling fan, a heat exchanger, an air conditioner, and a fire extinguishing device, wherein the image processing device is configured to process images captured by the camera:

[0010] The control system classifies the status inside the box-type transformer into: a first-level fire warning event, a second-level fire warning event, and a third-level fire warning event according to the different states of the signal from the temperature sensor, the signal from the smoke sensor, and the image signal processed by the image processing device.

[0011] When the control system detects the first-level fire warning event, it controls the cooling fan to be turned on; when the control system detects the second-level fire warning event, it controls the heat exchanger and air conditioner to be turned on; when the control system detects the third-level fire warning event, it controls the non-fire power supply to be cut off and the fire extinguishing device to be started, and when the control detects the third-level fire warning event, it controls the image processing device to determine the coordinates of the fire point according to the image captured by the camera, and the control system controls the fire extinguishing device to automatically move and rotate to the position closest to the fire point coordinates to extinguish the fire according to the fire point coordinates.

[0012] Furthermore, the first-level fire warning event is: the temperature value detected by the temperature sensor reaches 70%-89% of a preset threshold, the smoke sensor signal is 0, and the image processing device recognizes that there is no fire signal.

[0013] Furthermore, the second-level fire warning event is: the temperature value detected by the temperature sensor reaches 70%-89% of the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is no fire signal; or the temperature value detected by the temperature sensor reaches 90%-99% of the preset threshold, the smoke sensor signal is 0, and the image processing device recognizes that there is no fire signal.

[0014] Furthermore, the third-level fire warning event is: the temperature value detected by the temperature sensor reaches 90%-99% of the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is no fire signal; or the temperature value detected by the temperature sensor is greater than or equal to the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is a fire signal.

[0015] Furthermore, the fire extinguishing device includes a fire extinguisher, a pipe, a nozzle, a nozzle base, and a fastening sleeve. The nozzle is installed on the pipe through the nozzle base and the fastening sleeve. The nozzle moves along the pipe through a linear motion device and rotates through a rotating device.

[0016] Furthermore, the linear motion device includes a first motor and a pulley transmission device, the first motor can drive the pulley transmission device to rotate, the pulley transmission device is arranged on the surface of the pipeline, and the pulley transmission device is connected to the nozzle base.

[0017] Furthermore, the rotating device includes a rotating chassis, a second motor, a second gear, a first gear, and a third motor. The output shaft of the second motor is connected to the second gear, the second gear is engaged with the first gear, the output shaft of the first gear is connected to the nozzle, and the rotating chassis includes two left and right mounting seats, the third motor is installed in the mounting seat, and the third motor is connected to the nozzle.

[0018] Furthermore, after the control system identifies the coordinates of the ignition point according to the image, it controls the nozzle to move linearly along the pipeline to the pipeline closest to the coordinates of the ignition point, and further controls the rotating device to rotate the nozzle to align with the coordinates of the ignition point.

[0019] Furthermore, it also includes electric shutters, which are arranged on the transformer box.

[0020] The second aspect of the present application provides an automatic fire alarm and fire extinguishing method in a box-type transformer, which adopts the above-mentioned automatic fire alarm and fire extinguishing system in a box-type transformer.

[0021] Compared with the prior art, this application has at least the following technical effects:

[0022] (1) The present application sets a temperature sensor, a smoke sensor and a camera. The control system combines the different states of the signals obtained after processing the temperature sensor signal, the smoke sensor signal and the image captured by the camera to make a comprehensive judgment on the indoor conditions of the transformer. The different conditions in the transformer room are identified based on the different signals emitted by the three detection devices, and fire hazards are discovered in time. The comprehensive judgment of the three detection signals can reduce the error caused by the inaccuracy of one detection method, making the judgment of the environment inside the box more accurate, preventing huge losses or unnecessary alarms, and accurately issuing fire warnings.

[0023] (2) The present application is also provided with a fire extinguishing device, a cooling fan, a heat exchanger, and an air-conditioning electric shutter. According to the different states of the temperature sensor, the smoke sensor, and the image captured by the camera, the control system controls the operation of the cooling fan, the heat exchanger, the air-conditioning or the fire extinguishing device, and selects different processing methods according to the different conditions detected by the detection device, so as to eliminate the fire hazard in time and effectively protect the box transformer. At the same time, the fire point is accurately identified by the image processing device, and the fire extinguishing device is controlled by the control system to extinguish the fire in a targeted and accurate manner, which not only ensures safety but also minimizes damage to the equipment.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram showing the automatic fire alarm and fire extinguishing system in the box-type transformer in this application is shown;

[0027] Figure 2 A schematic diagram showing the fire extinguishing device in the transformer room in this application is shown;

[0028] Figure 3 Shows a schematic structural diagram of the fire extinguisher in this application;

[0029] Figure 4 Shows a schematic structural diagram of the linear motion device and the rotational motion device in this application;

[0030] Figure 5 Shows a schematic diagram of the installation of the electric blinds in the transformer box in this application;

[0031] Figure 6 The figure shows a schematic structural diagram of the electric blinds in this application.

[0032] In the picture:

[0033] 10. Fire extinguishing device; 11. Fire extinguisher; 111. Hook bolt; 112. Pressure gauge; 113. Container valve; 114. Solenoid; 115. Union; 116. Elbow; 12. Pipeline; 121. Seal; 13. Sprinkler; 131. Sprinkler housing; 14. Sprinkler base; 15. Fastening sleeve; 151. First channel; 16. Fixed housing;

[0034] 20. Electrical cabinet;

[0035] 30. Linear motion device; 31. Pulley transmission device; 311. Pulley; 312. Track; 313. Drive shaft; 314. First motor; 315. Sliding housing;

[0036] 40. Rotating device; 41. Rotating chassis; 42. Second motor; 43. Second gear; 44. First gear; 441. Second channel; 45. Third motor;

[0037] 50. Electric blinds; 51. Fourth motor; 52. Third gear; 53. Rack; 54. Rotating shaft; 55. Limit switch; 56. Shutter blades; 57. Frame; 58. Side cover; 59. Control switch. DETAILED DESCRIPTION

[0038] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and thus particular embodiments described herein are not intended as being exhaustive of what the present disclosure can provide. For example, although processes are described with regard to particular operational flows, various changes can be made within the scope of the present disclosure. For example, the order of operations can be changed, or certain operations can be performed in parallel, or operations can be added or omitted. Moreover, although description of features can be directed to particular embodiments, one skilled in the art will understand that alterations and / or

[0039] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as illustration of some of the many possible forms in which the methods, apparatuses, and / or systems described herein can be implemented.

[0040] Throughout the specification, when an element (such as a layer, region, or substrate) is referred to as being “on” another element, “connected to” another element, “coupled to” another element, “in contact with” another element, or “covering” another element, it can be directly on, connected, coupled, in contact with, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being “directly on,” “directly connected to,” “directly coupled to,” “directly in contact with,” or “directly covering” another element, there are no other elements interposed therebetween.

[0041] As used herein, the term “and / or” includes any one of the listed items and any combination of two or more of the listed items.

[0042] Although terms such as “first,” “second,” and “third” can be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, the element, component, region, layer, or section referred to as the first element, component, region, layer, or section in the examples described herein can also be referred to as the second element, component, region, layer, or section without departing from the teachings of the examples.

[0043] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0044] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] This application provides an automatic fire alarm and fire extinguishing system in a box-type transformer, which is installed in the transformer room and monitors multiple box-type transformers (hereinafter referred to as box-type transformers) in the transformer room to promptly detect fire hazards and dangers. It mainly includes the following aspects:

[0048] The first aspect of the present application provides an automatic fire alarm and fire extinguishing system for a box-type transformer, such as Figures 1-6As shown, the control system, temperature sensor, smoke sensor, camera, image processing device, cooling fan, heat exchanger, air conditioner, fire extinguishing device, the image processing device is used to process the image taken by the camera. For example, in this application, the temperature sensor can be installed on the inner wall of the transformer room, specifically on the corresponding position of the component prone to fire, focusing on measuring the temperature at this position. In some alternative embodiments, the temperature sensor can be multiple, uniformly installed on the inner wall of the transformer room, and can also be unevenly installed on the inner wall of the transformer room, such as installing multiple temperature sensors at key positions that need to be monitored, and only one temperature sensor at other positions. The camera can be installed in the transformer room for easy observation of the entire transformer room, such as timely detection of whether there is a fire point at the high-voltage cable terminal, low-voltage cable terminal, circuit breaker, high-voltage fuse cylinder and other parts; a camera can also be installed on each component to independently monitor the condition of each component in real time. The camera transmits the pictures or videos collected in the transformer room to the image processing device, which can perform image recognition processing on the pictures in real time, and can obtain whether there is smoke, firelight and other conditions in the transformer room in real time according to image recognition, timely discovery of fire, and pre-warning and fire extinguishing. The smoke sensor is installed on the inner wall of the transformer room to monitor whether the components in the room produce smoke with a smoke concentration signal, so as to timely judge the size of the fire.

[0049] For example, the signal of the temperature sensor is the detected temperature value in the transformer room; the signal of the smoke sensor is 0 or 1, when the detected signal of the smoke sensor is 0, it means that no smoke is detected in the transformer room, when the detected signal of the smoke sensor is 1, it means that the signal is detected in the transformer room; the image signal processed by the image processing device is a firelight signal and a no-firelight signal, the control system comprehensively judges the condition in the transformer room according to the different states of the temperature sensor signal, the smoke sensor signal and the image signal processed by the image processing device, and divides the state of the fire warning event in the box transformer into three levels according to the above detected signals, which are: first-level fire warning event, second-level fire warning event and third-level fire warning event.

[0050] In some alternative embodiments, when the control system detects the first-level fire warning event, the cooling fan is controlled to be turned on. For example, when the temperature value detected by the temperature sensor is the first-level temperature, the signal of the smoke sensor is 0, and the image signal processed by the image processing device is no-firelight, the control system judges that the transformer room is a first-level fire warning event, which means that there is a possibility of fire, at this time, only the cooling fan can be used to cool the transformer room or the component with higher temperature to reduce the possibility of fire.

[0051] In some optional embodiments, when the control system detects the second-level fire warning event, it controls to turn on the heat exchanger and the air conditioner.

[0052] For example, when the temperature value detected by the temperature sensor is a level 2 temperature, the signal of the smoke sensor is 0, and the image signal processed by the image processing device shows no fire, the control system determines that the transformer room is a level 2 fire warning event, indicating that there is a high possibility of a fire. At this time, it is necessary to turn on the controller and the air conditioner at the same time to quickly cool down the transformer room and reduce the possibility of fire.

[0053] In some optional embodiments, when the control system detects the third-level fire warning event. For example, when the temperature value detected by the temperature sensor is a third-level temperature, the signal of the smoke sensor is 1, and the image signal processed by the image processing device indicates that there is fire, the control system determines that the transformer room is a third-level fire warning event, which indicates that a fire has occurred. The control system controls the non-fire power supply in the transformer room to be cut off, and activates the fire extinguishing device. When the control detects the third-level fire warning event, the control system controls the image processing device to determine the coordinates of the fire point according to the image captured by the camera. The control system controls the fire extinguishing device to automatically move and rotate to the position closest to the fire point coordinates according to the fire point coordinates to extinguish the target object and prevent the fire from further spreading.

[0054] Therefore, the automatic fire alarm and fire extinguishing system in the transformer box provided by the present application, by setting up a temperature sensor, a smoke sensor and a camera, the control system combines the different states of the signal obtained after processing the temperature sensor signal, the smoke sensor signal and the image captured by the camera to make a comprehensive judgment on the indoor condition of the transformer, and identifies the different conditions in the transformer room based on the different signals emitted by the three detection devices, and discovers fire hazards in time. The comprehensive judgment of the three detection signals can reduce the error caused by the inaccuracy of one detection method, making the judgment of the environment inside the box more accurate, preventing huge losses or unnecessary alarms, and can accurately issue fire warnings.

[0055] Furthermore, the first-level fire warning event occurs when the temperature sensor detects a temperature value at any location within the transformer chamber that reaches 70%-89% of a preset threshold, the smoke sensor signal is 0, and the image processing device identifies a no-fire signal. In the above scheme, when the temperature value detected by the temperature sensor reaches 70%-89% of the preset threshold, it indicates that the temperature within the transformer chamber is high, and if the temperature of a component exceeds this threshold, a fire or explosion may occur. However, further determination is needed to determine whether smoke and flames are present. A comprehensive assessment indicates that the current temperature within the transformer chamber is too high, but no fire has occurred. Therefore, the control system only needs to turn on the cooling fan to cool the transformer chamber, without turning on other fire-extinguishing components, thus avoiding unnecessary waste.

[0056] It should be noted that the preset temperature threshold in the present application may be obtained based on historical empirical values, or may be an average value of the temperature values ​​reached when a fire may have occurred in a transformer room in the past.

[0057] Furthermore, the second-level fire warning event occurs when the temperature sensor detects a temperature value at any location within the transformer chamber reaching 70%-89% of a preset threshold, the smoke sensor signal is 1, and the image processing device detects no fire signal. This indicates that the transformer is currently at a high temperature and smoke is beginning to appear, indicating a possible fire. To prevent fire, the heat exchanger and air conditioner need to be turned on to promptly remove the smoke and increase transformer cooling.

[0058] In some optional embodiments, the second-level fire warning event is: the temperature sensor detects that the temperature value at any location in the transformer room reaches 90%-99% of the preset threshold, and the smoke sensor signal is 0, and the image processing device recognizes that there is no fire signal. At this time, although there is no smoke and fire, the temperature is too high and a fire may occur relatively quickly. However, it is necessary to turn on the heat exchanger and air conditioner at the same time to increase the cooling of the transformer so that the temperature value can be quickly reduced to avoid the occurrence of fire.

[0059] In some optional embodiments, the third-level fire warning event is: the temperature sensor detects that the temperature value at any position in the transformer room reaches 90%-99% of the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is no fire signal. At this time, the temperature in the transformer room is close to the preset temperature threshold, and smoke begins to be generated. Although there is no fire, a small flame may have been generated inside a component, which in turn causes smoke to be generated. Next, the flame may spread to the outside of the component, which may further cause a larger fire or explosion. Therefore, it is necessary to quickly cut off the non-fire power supply and start the fire extinguishing system to avoid the occurrence of fire.

[0060] In some alternative embodiments, the third fire warning event is that the temperature sensor detects that the temperature value at any position in the transformer room is greater than or equal to a preset threshold, the smoke sensor signal is 1, and the image processing device identifies a firelight signal. At this time, the temperature in the transformer room is equal to or greater than the preset threshold of the temperature, and is accompanied by the generation of smoke and firelight, indicating that a fire has occurred, and rapid fire extinguishing is required. The control system controls to cut off the non-fire power supply and starts the fire extinguishing system to avoid the occurrence of fire.

[0061] Further, the fire extinguishing device 10 comprises a fire extinguisher 11, a pipeline 12, a spray head 13, a spray head base 14, and a fastening sleeve 15. The spray head 13 is installed on the pipeline 12 through the spray head base 14 and the fastening sleeve 15. The spray head 13 moves along the pipeline 12 through a linear motion device 30 and rotates through a rotating device 40.

[0062] In the above scheme, the fire extinguishing device 10 further comprises a fixed shell 16 located at the bottom of the transformer room. The fixed shell 16 can be placed at the bottom of the transformer room or fixed at the bottom of the transformer room by adhesion, welding, or the like. The fixed shell 16 is a hollow structure, the fire extinguisher 11 is placed in the hollow structure of the fixed shell 16, the outer wall of the fire extinguisher 11 is fixedly connected to the inner wall of the fixed shell 16 through a hook-shaped bolt 111 and a clamp, and the outlet end of the fire extinguisher 11 is connected to the pipeline 12.

[0063] Further, the outlet end of the fire extinguisher 11 is connected to a container valve 113, which can control the fire extinguishing material in the fire extinguisher 11 to enter the pipeline 12. A connection pressure gauge 112 is installed on the right side of the container valve 113. The pressure gauge 112 can measure the pressure value of the outlet end of the fire extinguisher 11, so as to timely obtain the pressure value of the outlet end of the fire extinguisher 11 and timely control the pressure value of the outlet end of the fire extinguisher 11. An electromagnet 114 is installed on the top of the container valve 113. The electromagnet 114 can control the opening and closing of the container valve 113, so that the fire extinguishing material in the fire extinguisher 11 can enter the pipeline 12. A union joint 115 is installed on the left side of the container valve 113. The other end of the union joint 115 is connected to an elbow 116, which is connected to the pipeline 12. The pipeline 12 can be detachably connected to the container valve 113 through the union joint 115 and the elbow 116, so as to facilitate the replacement and inspection of the fire extinguisher 11.

[0064] One end of the pipeline 12 extends into the fixed shell 16 and is connected to the fire extinguisher 11. The other end of the pipeline 12 is provided with the spray head 13.

[0065] Further, the end of the spray head 13 is rotationally connected with the spray head base 14, and the spray head base 14 is installed on the pipeline 12 through the fastening sleeve 15. The linear motion device 30 is installed on the pipeline 12, and is fixedly connected with the spray head base 14, and can drive the relative movement of the spray head 13 along the pipeline 12, so that the spray head 13 can be aimed at different fire points for fire extinguishing, and the application range is wide.

[0066] Further, the pipeline 12 is provided with an opening along the axial direction, and the fastening sleeve 15 is installed in the pipeline 12 through the opening. The first channel 151 is arranged in the fastening sleeve 15, one end of the first channel 151 is in communication with the opening of the pipeline 12, and the other end is in communication with the spray head 13.

[0067] Further, the fastening sleeve 15 can slide along the opening of the pipeline 12, and the sealing element 121 is arranged between the opening of the pipeline 12 and the fastening sleeve 15, and is used for sealing the opening of the pipeline 12. During the sliding of the fastening sleeve 15 along the opening of the pipeline 12, the fire extinguishing material in the pipeline 12 can enter the spray head 13 through the first channel 151 of the fastening sleeve 15, and is sprayed out to the fire site through the spray head 13.

[0068] Further, the rotation device 40 is arranged between the spray head 13 and the spray head base 14, and can drive the spray head 13 to rotate relative to the spray head base 14, so that the spray head 13 expands the fire extinguishing range during rotation, uniformly sprays, avoids the spread of the fire, and quickly extinguishes the fire.

[0069] Further, the linear motion device 30 includes a first motor 314 and a belt wheel transmission device 31. The first motor 314 can drive the belt wheel transmission device 31 to rotate. The belt wheel transmission device 31 is arranged on the surface of the pipeline 12 and is fixedly connected with the spray head base 14.

[0070] For example, the linear motion device 30 includes a first motor 314 and a belt wheel transmission device 31. The belt wheel transmission device 31 is partially installed on the surface of the pipeline 12, and the lower end thereof is fixedly connected with the spray head base 14. When the first motor 314 drives the belt wheel transmission device 31 to work, the spray head 13 can move linearly along the pipeline 12 and move to a preset position.

[0071] In some optional embodiments, the belt wheel transmission device 31 includes a sliding shell 315, which is slidingly installed on the surface of the pipeline 12, and the lower end of the sliding shell 315 is fixedly connected with the spray head base 14.

[0072] Furthermore, a first motor 314 is fixedly mounted within a sliding housing 315. There are at least two pulleys 311, symmetrically positioned on either side of the pipe 12. The pulleys 311 are connected to the output shaft of the first motor 314 via a drive shaft 313, and tracks 312 are mounted on the pulleys 311. The first motor 314 drives the drive shaft 313 to rotate, which in turn drives the pulleys 311 and tracks 312 to rotate along the surface of the pipe 12. This enables the linear motion device 30 to move linearly along the surface of the pipe 12, driving the nozzle base 14 and nozzle 13 to move linearly along the pipe 12 within the transformer chamber.

[0073] Furthermore, the rotating device 40 includes a rotating chassis 41, a second motor 42, a second gear 43, a first gear 44, a third motor 45, and a nozzle cover 131. The output shaft of the second motor 42 is connected to the second gear 43, and the second gear 43 is in transmission engagement with the first gear 44. The output shaft of the first gear 44 is connected to the rotating chassis 41, and the end of the output shaft of the first gear 44 passes through the nozzle cover 131. The nozzle cover 131 includes two left and right mounting seats, and the third motor 45 is installed in the mounting seat. The third motor 45 is connected to the nozzle 13.

[0074] Furthermore, the rotating chassis 41 is rotatably installed in the installation groove of the nozzle base 14, and the first gear 44 and the second gear 43 are installed on the top of the rotating chassis 41, and the first gear 44 and the second gear 43 are engaged; the output shaft of the second gear 43 is installed with a second motor 42, and the second motor 42 can drive the second gear 43 to rotate, thereby driving the first gear 44 to rotate.

[0075] Furthermore, the first gear 44 has an output shaft, one end of which is connected to the fastening sleeve 15 and the other end is connected to the spray head 13. The output shaft of the first gear 44 has a second channel 441, one end of which is connected to the first channel 151 of the fastening sleeve 15 and the other end of which passes through the rotating chassis 41 and is connected to the spray head 13.

[0076] Furthermore, a nozzle cover 131 is provided outside the nozzle 13 , and the top of the nozzle cover 131 is fixedly mounted to the bottom of the rotating chassis 41 .

[0077] Furthermore, the nozzle cover 131 can be made of transparent material.

[0078] Furthermore, mounting seats are symmetrically provided on the left and right sides of the nozzle cover 131, and a third motor 45 is installed in each mounting seat. The third motor 45 is rotatably connected to the nozzle 13. The third motor 45 can drive the nozzle 13 to rotate around the axis of the pipe 12, so that the spraying range of the nozzle 13 is further expanded and the fire extinguishing effect is better.

[0079] Furthermore, after the control system identifies the coordinates of the ignition point according to the image, it controls the nozzle to move linearly along the pipeline to the pipeline closest to the coordinates of the ignition point, and further controls the rotating device to rotate the nozzle to align with the coordinates of the ignition point.

[0080] In the above scheme, after the image recognizes the coordinates of the fire point, the control system can control the linear motion device 30 to start according to the coordinates, drive the nozzle 13 to move straight along the surface of the pipe 12 to a preset position, and then control the rotating device 40 to drive the nozzle 13 to rotate, so that the nozzle 13 is aimed at the fire point to extinguish the fire.

[0081] Furthermore, it also includes an electric shutter 50, which is arranged on the transformer box.

[0082] In some optional embodiments, the electric blinds 50 include a frame 57, which is mounted on a transformer box. The frame 57 is movably mounted with multiple blind blades 56. The rotating shaft 54 ​​of each blind blade 56 is fixedly connected to a third gear 52, and the lower end rack 53 of the third gear 52 is engaged. One of the third gears 52 is connected to a fourth motor 51, and the start and stop of the fourth motor 51 is controlled by a control switch 59.

[0083] Furthermore, the electric blinds 50 further includes a side cover 58, which is mounted on the surface of the transformer housing. The third gear 52, the rack 53, and the fourth motor 51 are mounted in the side cover 58. Furthermore, a limit switch 55 is mounted in the side cover 58 to detect the displacement of the rack 53 and thereby determine the opening degree of the electric blinds 50.

[0084] For example, when a fire is detected in the electrical cabinet 20 in the transformer or smoke is generated and the electric blinds 50 need to be opened, the control switch 59 can control the fourth motor 51 to rotate, thereby driving one of the third gears 52 to rotate, and the third gear 52 drives the rack 53 to rotate, and at the same time drives the remaining third gears 52 on the rack 53 to rotate. When the limit switch 55 detects that the rack 53 has rotated into place, the control switch 59 stops.

[0085] When a fire occurs, the electric shutters 50 can be remotely controlled to provide a fire warning, thereby reducing the occurrence of fire and casualties.

[0086] A second aspect of the present application provides a method for automatically extinguishing fires in a box-type transformer using the aforementioned automatic fire alarm system, comprising the following steps:

[0087] Step S100: Acquire signals from a temperature sensor in the box-type transformer, signals from a smoke sensor, and image signals processed by an image processing device;

[0088] Step S200: According to the signal of the temperature sensor, the signal of the smoke sensor, and the image signal processed by the image processing device, the cabinet is divided into a first fire warning event, a second fire warning event, and a third fire warning event;

[0089] Step S300: The control system controls the corresponding components to perform fire extinguishing warning work according to the different levels of warning events.

[0090] The above describes the embodiments of the present application in detail, and the principles and implementation modes of the present application are described by applying specific examples; the above embodiment description is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as limiting the present application.

Claims

1. An automatic fire alarm and extinguishing system for a box-type transformer, comprising a control system, a temperature sensor, a smoke sensor, a camera, an image processing device, a cooling fan, a heat exchanger, an air conditioner, and a fire extinguishing device. The image processing device is used to process images captured by the camera, and is characterized by: The control system classifies the status inside the box-type transformer into: a first-level fire warning event, a second-level fire warning event, and a third-level fire warning event according to the different states of the signal from the temperature sensor, the signal from the smoke sensor, and the image signal processed by the image processing device. When the control system detects the first-level fire warning event, it controls to turn on the cooling fan; When the control system detects the second-level fire warning event, it controls to turn on the heat exchanger and the air conditioner; When the control system detects the third-level fire warning event, it controls to cut off the non-fire power supply and start the fire extinguishing device. When the control system detects the third-level fire warning event, it controls the image processing device to determine the coordinates of the fire point according to the image captured by the camera. The control system controls the fire extinguishing device to automatically move and rotate to the position closest to the coordinates of the fire point to extinguish the fire according to the coordinates of the fire point. The first-level fire warning event is: the temperature value detected by the temperature sensor reaches 70%-89% of the preset threshold, the smoke sensor signal is 0, and the image processing device recognizes no fire signal; The second-level fire warning event is: the temperature value detected by the temperature sensor reaches 70%-89% of the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is no fire signal; or the temperature value detected by the temperature sensor reaches 90%-99% of the preset threshold, the smoke sensor signal is 0, and the image processing device recognizes that there is no fire signal; The third-level fire warning event is: the temperature value detected by the temperature sensor reaches 90%-99% of the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is no fire signal; or the temperature value detected by the temperature sensor is greater than or equal to the preset threshold, the smoke sensor signal is 1, and the image processing device recognizes that there is a fire signal.

2. The automatic fire alarm and fire extinguishing system in a box-type transformer according to claim 1 is characterized in that: The fire extinguishing device includes a fire extinguisher, a pipe, a nozzle, a nozzle base, and a fastening sleeve. The fire extinguisher is connected to the pipe. The nozzle is installed on the pipe through the nozzle base and the fastening sleeve. The nozzle moves along the pipe through a linear motion device and rotates through a rotating device.

3. The automatic fire alarm and fire extinguishing system in a box-type transformer according to claim 2 is characterized in that: The linear motion device includes a first motor and a pulley transmission device. The first motor can drive the pulley transmission device to rotate. The pulley transmission device is arranged on the surface of the pipeline and is connected to the nozzle base.

4. The automatic fire alarm and fire extinguishing system in a box-type transformer according to claim 2 is characterized in that: The rotating device includes a rotating chassis, a second motor, a second gear, a first gear, a third motor, and a nozzle cover. The output shaft of the second motor is connected to the second gear, and the second gear is engaged with the first gear. The output shaft of the first gear is connected to the rotating chassis, and the end of the output shaft of the first gear passes through the nozzle cover. The nozzle cover includes two left and right mounting seats, and the third motor is installed in the mounting seat. The third motor is connected to the nozzle.

5. The automatic fire alarm and fire extinguishing system in a box-type transformer according to any one of claims 2 to 4, characterized in that: After the control system identifies the coordinates of the ignition point according to the image, it controls the nozzle to move linearly along the pipeline to the pipeline closest to the coordinates of the ignition point, and further controls the rotating device to rotate the nozzle to align with the coordinates of the ignition point.

6. The automatic fire alarm and fire extinguishing system in a box-type transformer according to claim 1 is characterized in that: It also includes electric shutters, which are arranged on the transformer box.

7. A method for automatic fire alarm and fire extinguishing in a box-type transformer, characterized in that: An automatic fire alarm and fire extinguishing system in a box-type transformer is used as described in any one of claims 1 to 6.

Images